Sash forming machine



Ap 25, 1933' G. T. FORBREGD ET AL 9 5 SASH FORMING MACBINE Filed Sept. 16, 1929 fill/6W5 646222117 forbregd, V677Z07ZJZ Carma/L,

Patented Apr. 25, 1933 "UNITED STATES PATENT *oFFIcE;

GUSTAV 'r. roRBnEenANn VERNON R. CORNISH, or ELKHART, INDIANA, AssIeNoRs TO THE ADLAKE comrANY, or CHICAGO, ILLI QIs, A coRroRArIoN onILLrNoIs sAsn: FORMING MAcHI E Application filed'September 16', 1929. Serial No; 393,087.

This invention has to do with the processes and machines which are employed in the manufacture of the tubular sheet metal frame members forming the rails and stiles of sash, doors and the like, and is particularly concerned with certain hereinafter disclosed improvements in such processes and machines, which improvements provide. a satisfactory solution for the problems involved in endeavoring to produce in the frame memher a prick-punched seam.

One of the principal objects of the invention is to provide a novel method of prickpunching the seam in a tubular-sheet metal frame member. V

Anotherimportant object of the invention is to provide a novel device for prick-punching the seam.

Other objects and advantages of the invention will be evident upon a full understanding of the nature of the method and the construction, arrangement and operation of the device.

One form of. the invention is presented herein for the purpose of exemplification, but it will of course be appreciated that the invention is susceptible of embodiment in other structurally modified forms coming equally within the scope of the appended claims.

In the accompanying drawing:

Fig. 1 is a partially sectioned side View of the prick-punching device;

Fig. 2 is a transverse section, taken on the line 2-2 of Fig. 1;

Fig. 3 is a plan view of the lower portion of the device; and

Fig. 4 is a perspective view of a frame member in which the seam has been prick-punched with the device of the invention.

The device shown in the drawing may be used advantageously as an attachment on a regular rolling machine. As the tubular sheet metal frame member 10 is formed up from a blank and seamed in the machine, it is caused to sleeve over a closely fitting plug 11, which plug'is prevented from moving endwise with the frame member by a rod 12. The rod 12 is fastened at one end to the plug 11, and is fastened at the other end to a bracket 13, which bracket is located at a and is provided adjacent point in advance of the point where the blank for the frame member is rolled into tubular shape. i i

A spindle 14 is arranged above the plug 11 crosswise of the direction of travelof the frame member 10, and carries a circular die 15 which is secured concentrically to the spindle by a key 16. The die 15 is preferably made in two laterally separable sections 17 and 18,

a large number of radially extending sockets 19 in which a corresponding number of outwardly polnted piercing studs 20 are positioned. The studs 20 are clamped in the sockets between the two sections of the die by a'number of screws 21, and may be removed and changed by merely loosening the screws.

The frame memberIO and the die 15.1nove at the same linear speed, and, during such movement, the studs 20 form longitudinally space-d indentations 22 in the layers of metal making up the seam 23 in the frame member,

resulting in the seam being permanently and rigidly united. The plug 11 forms an anvil its periphery with against whichthe studs 20 deform the seam to produce the indentations, and the plug is prevented, fromyielding away from the die by an adjacent part 24. of the rolling machine upon which the bottomofthe frame member bears in moving along about the plug.

i It will be observed in Fig. 2 that the seam 23 is formed up, flattened and prick-punched at the. center of the bottom of a relatively wideglazing groove. 25 in the tubularsheet metal frame member. As it is of considerable importance that the line of prick punches extend along the center of the narrow seam in spaced relation to the'sides thereof and that no distortion of the frame memberbe caused by the prick-punchingoperation, the rim of the circular die 15 is made flat andIof substantially the same width as the groove 25 whereby to, bear against. the seam and the 1 served that the plug 11 which fits inside of the'frame member is provided at its sides with narrow blade-like flanges 27 which project up into the hollow edges of the frame member. The plug 11 is also provided with a narrow trough 28' between the flanges m which the seam 23' tracks. This interfitting arrangement of parts insures an accurateouter side of the seam at a pointopposite the plug, and a plurality of radially projecting studs positioned in' sockets in the periphery of the a die at intervals circumferentially thereof'for prick-punching the seam against the plug''upon'rotationof the die, said die being laterally separable in the plane of the sockets to permit replacement of the studs.

2. A rolling machine attachment for prick-punching'the seam in a tubular sheet metal frame member being rolled in an associated machine, comprising a plug adaptedto be positioned within the frame member against the inner side ofthe .seam, and a circular die adapted to be positioned outside the frame member and in operable relation with the outer side of the seam of said frame member at a point opposite the plug, said circular die comprising two complementary sections provided with cooperating peripheral socket recesses, radially projecting studs mounted in said sockets, and adjustable means for clamping said complementary sections together. i y

3. A rolling. machine attachment for prickpunching' the seam in a tubular sheet metal frame member being rolled in an associated machine, comprising a plug adapted to be positioned within the frame member against the inner side ofthe seam, and a circular die adapted to be positioned outside the frame member and in operable relation with the outer side of theseam of'said frame member at a point opposite the plug, said circular die comprising two complementary sections provided with cooperating peripheral socket recesses, radiallyprojectingstuds mounted {in said sockets, adjustable means 'for'clamp'ing said 'complementai'ysections together, and a circular shoulder on: each of said tem l mentary sections positionedrinwardlyfrom theouter' face of the die. V 4'; A rolling machine attachment for prickpunching a seamin the bottomof 'a channel in a sheet metal frame member, comprising a plug adapted to be positioned within the frame member against the inner side of the seam, and a circular prick-punching die adapted to be positioned outside the frame member and in operable relation with the outer side of the seamofsaid framemember at a-point opposite the plug, said circular die being of such radial section as to track within the channel in the frame member in closely fitting engagement with the sides of the channel, whereby to definitely space the prick punches with respect to the sides of the channel, and said plug being provided with means for embracing. the outer sides of the channel, whereby to maintain the die, plug and frame member in operative relation to each other and to the seamduring passage of the frame member through the machine;

5; A rolling'machine attachment for prickpunching the central portion only of a narrow seam in-tl1ebotto1n of a relatively wide channel in a sheet metal frame member, comprising a plug adapted to be positioned with in the frame member against the inner side of the seam, and a circular'prick-punching die adapted to be positioned outside the frame 11161111761 and in operable relation with the outer'side of the seam of said frame member at a point opposite the plug, said circular die being of substantially the same width as the i channel, whereby to track without appreciable side play in the latter and space the prick punches definitely Wit-h respect to the sides of the channel, and said plug being provided with side flanges which slidingl y embrace the sides of the channel. I

In witness whereof we have hereunto subscribed our names. I

' GUSTAV 'li. FORBREGD. VVERNON R. CORNISH.

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